Improvement in low-water indicators



PATENT OFFICE.

CHARLES N. MYERS, OF CHICAGO, ILLINOIS.

IMPROVEMEN'rI IN LOW-WATER INDICATORS.

Specification forming part of Letters Patent No. 154,513, dated August 25, 1874 application filed June 6, 1873.

To all whom it may concern:

Be it known that I, CHARLES N. MYERS, of thecity of Chicago, in the county of Cook and State of Illinois,have invented a new and Improved Method of Indicating High Steam and Low Water for all Steam Boilers; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing and the letters of reference marked thereon.

The invention relates specifically to the construction and arrangement of parts, as hereinafter described and claimed, whereby a valve, which controls the access of steam to an alarmwhistle, is supported in the ease containing the doat, also connected with the latter, and adapted to be ground toits seat.

The generator C has a steam-dome,A, which communicates with the tube F of the alarm apparatus. Said tube rises vertically from the float case or chamber, and has a lateral extension, on which an alarm whistle is located. When the steam-pressure in the tube exceeds the tension of the `spring in its upper portion the valve H, on which it presses, will be raised from its seat and the alarm-whistle 1 sounded by admission of steam to the lateral arm. The. tension. or pressure of the spring is regulated by means of a screw-rod, I, working through a cap on the upper end of tube F, and operated by a hand-wheel or crank, K, as shown. The pipe J is the means of communication between the water-space of the boiler C and the vbottom of the case or chamber L, containing the float M. Thus, the level of the .water in the generator C will always be the same as in the float-chamber. The float is a hollow metal sphere, preferably made of hemispherical sections screwed together, and is pivoted to an arm or lever, a, which is, in turn, hinged to a lug at the side of the case. An elbow-lever, b. is pivoted, at its angle, to the opposite side of the. case, and connected with lever a by a link, c. Its shorter vertical arm forms suitable connection with a horizontal rod, d, having a valve, c, formed von one end to close the mouth of the tube leading to the alarm-whistle 2, while its opposite end works in a tubular extension, t', of the oatcase. Collars r r are formed on the shaft or rod d, and the vertical arm of lever b is forked to adapt it to embrace and support said rod, and act against the collars to open or close the'valve. It is apparent that when the water falls below a' certain level the float will act on the valve-rod through the medium of the levers a b, open the passage to whistle 2, and thus allow steam to enter and sound the alarm. '.Ihe aforesaid tubular extension t' of the case L is closed by a screw-cap,which prmits the insertion of a suitable tool for turning the valverod d to grind the valve to its seat, when required, to prevent leakage. To this end I preferably form` a groove or notch, w, in the end of the valve-rod, to adapt it for the application of the turning device.

It will be seen that the valve-rod is thus supported by or has its bearings in the shorter arm of the elbow-lever and the tubular extension At the same time the valve is operated by said lever-support, and the arrangement is such that it may be ground to its seat, when required, wit-hout other` preparation or preliminary labor than removal of the screwcap from the extension i.

The liquid contents of the float-case, which is conical or spherical at the bottom for the purpose, may be drawn off by pipe E when the cock D of pipe J is turned to close the passage to the boiler. Y

The float, case, valve, valve-stem, and valveseats will, in practice, be nickel-plated to preveut corrosion.

What I claim is- The horizontally-reciproeating rod d, carrying valve c, andv having collars r' r and notch the elbow-lever b, and tubular extension i, combined as shown and described, and arranged with relation to the oat-case, as speciiied.

CHARLES N. MYERS.

Witnesses:

J Aeon RICHTER, SYLvEsTER CHASE. 

